简介：TheconfigurationdatabasesareanimportantpartoftheTrigger/DAQsystemofthefutureATLASexperiment.Thispaperdescribestheircurrentstatusgivingdetailsofarchitecture,implementation,testresultsandplansforfuturework.

简介：WithintheATLASexperimentTrigger/DAQandDCSarebothlogicallyandphysicallyseparated.Neverthelessthereisaneedtocommunicate.TheinitialproblemdefinitionandanalysissuggestedthreesubsystemstheTrigger/DAQDCSCommunication(DDC)projectshouldsupporttheabilityto:1.exchangedatabetweenTrigger/DAQandDCS;2.sendalarmmessagesfromDCStoTrigger/DAQ;3.issuecommandstoDCSfromTrigger/DAQ.Eachsubsystemisdevelopedandimplementedindependentlyusingacommonsoftwareinfrastructure.AmongthevarioussubsystemsoftheATLASTrigger/DAQtheOnlineisresponsibleforthecontrolandconfiguration.Itistheglueconnectingthedifferentsystemssuchasdataflow.level1andhigh-leveltriggers.TheDDCusesthevariousOnlinecomponentsasaninterfacepointontheTrigger/DAQsidewiththePVSSIISCADAsystemontheDCSsideandaddressesissuessuchaspartitioning,timestamps,eventnumbers,hierarchy,authorizationandsecurity,PVSSIIisacommercialproductchosenbyCERNtobetheSCADAsystemforallLHCexperiments,ItsAPIprovidesfullaccesstoitsdatabase,whichissufficienttoimplementthe3subsystemsoftheDDCsoftware,TheDDCprojectadoptedtheOnlineSoftwareProcess,whichrecommendsabasicsoftwarelife-cycle:problemstatement,analysis,design,implementationandtesting.Eachphaseresultsinacorrespondingdocumentorinthecaseoftheimplementationandtesting,apieceofcode,InspectionandreviewtakeamajorroleintheOnlinesoftwareprocess,TheDDCdocumentshavebeeninspectedtodetectflawsandresultedinaimprovedquality.AfirstprototypeoftheDDCisreadyandforeseentobeusedatthetest-beamduringsummer2001.

简介：TheALICETriggerandDataAcquisition(TRG/DAQ)Systemisrequiredtosupportanaggregateeventbuildingbandwidthofupto4GByte/sandastoragecapabilityofupto1.25GByte/stomassstorage.Thesystemhasbeendecomposedinasetofhardwareandsoftwarecomponentsandprototypesofthesecomponentsarebeingdeveloped.Itisnecessarytoveritythesystemdesign,itscapabilitytoreachtheexpectedbehaviorandthetargetperformances,discoverpossiblebottlenecksandwaystocorrectforthem,andexplorealternativealgorithmsandnewarchitectures.ToachievethisthecompleteTRG/DAQsystemhasbeenformallyspecified.andtheverificationoftheexpectedbehaviorhasbeenperformedthroughtheexecutionofthespecification,Twotoolswereusedforthis.Foresight,andPtolemy.

简介：TheARGO-YBJexperimentispresentlyunderconstructionattheYangbaijinghighAltitudeComsmicRayLaboratory(4300ma.s.l).90KmNorthtoLhasa(Tibet,peolpl'sRepublicofChina)ARGO-YBJwillstudyfundamentalissuesincosmicrayandastroparticlephysicsbydetectingsmallsizeairshowers.Thedetectorcovers-71×74squaremeterswithasinglelayerofresistivePlateCounters(RPCs),surroundedbyaguardringpartiallyinstrumented.Anevent-drivendatacollectionschemeisimplementedbyusingacustombusprotocol./Keyfeaturesofthisarchitectureareblock-orienteddatatransferandread-outcycleslabeledbytriggernumber,HardwareenginesinbothmasterandDAQboardshandlebustransactionsandprovideeventbuilingcapability,achievingreal-timedataprocessingwithnosoftwareoverhead.InthispaperwepresentthehardwaredesignoftheARGOexperiment'sDAQwhichbenefitsfromtheflexiblearchitectureofin-systemreconfigurableFPGAs.Thedataacquistitionboardsspecificallydevelopedforthisapplicationwillbedescribed.

简介：TheneutronTimeOfFlight(nTOF)facilityatCERNisahighfluxspallationneutronsourcecommissionedinNov2000andAPr2001.ForthecommissioningphasesaninnovativemultipurposeDAQsystemwasdevelopedandused.Thissystemiscapableofhandlinghighdatarated(10Mb/s)withtheuseoftheNationalInstrumentsPCI-VXIinterfaceboardtocommunicatewiththeVMEcrates.ThegraphicaluserinterfaceisbasedonJava^TMandROOTallowingimmediatevisualizationofthedataandprovidingaflexiblewayofcreatingconfigurationsforvariousexperimentalsetups.

简介：TheFermilabCKM(E921)experimentstudiesararekaondecaywhichhasaverysmallbranchingratioandcanbeveryhardtoseparatefrombackgroundprocesses.AtriggerandDAQsystemisrequiredtocollectoallnecessaryunformationforbackgroundrejectionandtomaintainhighreliabilityathighbeamrate.Theuniquechallengeshaveemphasizedthefollowingguidingconcepts:(1)Collectingbackgroundisasimportantascollectinggoodevents.(2)ADAQ"event"shouldnotbejusta"snapshot"ofthedetector.Itshouldbeashorthistoryrecordofthedetectoraroundthecandidateevent.Thehithistoryprovidesinformationtounderstandtemporarydetectorblindness,whichisextremelyimportanttotheCKMexperiment.(3)Themainpurposeofthetriggersystemshouldnotbe"knockingdowntriggerrate"or"throwingoutgarbageevents".Instead,itshouldclassifytheeventsandselectappropriatedatacollectingstraegiesamongvariouspredefinedonesforthegiventypesoftheevents.Thefollowingmethodologiesareepmployedinthearchitecturetofulfilltheexperimentrequirementswithoutconfrontingunnecessarytechnicaldifficulties.(1)Continuousdigitizationnearthedetectorelementsisutilizedtopreservethedataquality.(2)Theconceptofminimumsynchronizationisadoptedtoeliminatetheneedsoftimematchingsignalpaths.(3)Agloballevel1triggerperformscoincidentandvetofunctionsusingdigitaltiminginformationtoavoidproblemsduetosignaldegradinginlongcalbes.(4)TheDAQlogicallowstocollectchroniclerecordsaroundtheinterestingeventswithdifferentlevelsofdetailofADCinformation,sothatverylowenergyparticlesinthevetosystemscanbebestdetected.(5)Are-programmablehardwaretrigger(L2.5)andasoftwaretrigger(L3)sittingintheDAQstreamareplannedtoperformdataselectionfunctioinsbasedonfulldetectordatawithadjustability.

简介：<正>“触发”,是艺术创作的催产婆。作家高晓声对此说:“‘触发’是一切创作之母”,这确是一语中的。“触发”。有哪些类型呢?一是灵感“触发”。大凡创造性的劳动,都离不开灵感。它是打开创造思维的闸门之神,是引爆才智之库的导火线。别林斯基说:“每一部艺术作品都是艺术家的灵感努力的结果……灵感是一切创造的源泉。”(《别林斯基选集》2卷第473页)

简介：摘 要：虚拟仪器是计算机辅助测试领域的一项重要技术，它将计算机硬件、仪器硬件、软件三者有效结合。虚拟仪器技术利用高性能模块化硬件，结合高效灵活的软件来完成各种测试、测量和自动化应用。虚拟仪器技术性能高、扩展性强、开发时间短、集成高效出色，PC-DAQ虚拟仪器系统是构成VI的最基本的方式，也是最廉价的方式。本文介绍了PC-DAQ（Data Acquisition）系统虚拟仪器系统设计基本流程。

简介：李小龙的截拳道．地头力作为一种突破性思维，具有三个层面的含义：一是“从结果出发”，不要从你掌控的资源出发和你的能力出发：二是一种整体思维，一种不是把事物割裂开来的认知．一种在关系中反求诸己的睿智：三是“单纯化思维”，不把事情想复杂了，把注意力锁定在目标上。突破性思维，想想都很简单，可实操起来就不那么容易了。近日在远大空调内训，我出了个游戏题：“谁能在10秒钟之内把手举得最高？”我一再关照，要学着用从结果出发、整体感、单纯化三个纬度想问题。

简介：房子油漆数年后，漆层自然龟裂剥落，使墙面显得残破不堪。在新刷油漆之前，最好将残留油漆刮掉，但要做到这一点，费时费工，有什么好办法清除残留油漆呢？有家化学公司的一名年轻人口出“狂言”：“我们在油漆中加入火药如何？”

简介：1名词术语的含义●脉冲幅度:在规定电压时,从零电平到主峰的电压绝对值.●次峰幅度:在规定电压时,紧挨主峰的过零电平的次峰幅值.●脉冲宽度:在规定电压时,在主峰0.9幅值处脉冲持续的时间.

简介：TheOnlineBook-keeper(OBK)wasdevelopedtokeeptrackofpastdatatakingactivity,aswellasprovidingthehardwareandsoftwareconditionsduringphysicsdatatakingtothescientistsdoingofflineanalysis.TheapproachadoptedtobuildtheOBKwastodevelopaseriesofprototypes,experlimentingandcomparingdifferentDBMSsystemsfordatastorage,Inthispaperwedescribetheimplementedprototypes,analysetheirdifferentcharacteristicsandpresenttheresultsobtainedusingacommonsetoftests.

简介：AspresentedatthelastCHEPconference,theBTeVtriggeringanddatacollectionposeasignificantchallengeinconstructionandoperation,generating1.5Terabytes/secondofrawdatafromover30milliondetectorchannels.WereportonfacetsoftheDAQandtriggerfarms.WereportonthecurrentdesignoftheDAQ,especiallyitspartitioningfeaturestosupportcommissioningofthedetector.Weareexploringcollaborationswithcomputersciencegroupsexperiencedinfaulttolerantanddynamicreal-timeandembeddedsystemstodevelopasystemtoprovidetheextremeflexibilityandhighavailabilityrequiredoftheheterogeneoustriggerfarm(-tenthousandDSPsandcommodityprocessors).Wedescribedirectionsinthefollowingareas:systemmodelingandanalysisusingtheModelIntegratedComputingapproachtoassistinthecreationofdomain-specificmodeling,analysis,andprogramsynthesisenvironmentsforbuildingcomplex,large-scalecomputer-basedsystems;SystemConfigurationManagementtoincludecompileabledesignspecificationsforconfigurablehardwarecomponents,schedules,andcommunicationmaps.RuntimeEnvironmentandHierarchicalFaultDetection/Management-asystem-wideinfrastructureforrapidlydetecting,isolating,filtering,andreportingfaultswhichwillbeencapsulatedinintelligentactiveentites(agents)torunonDSPs,L2/3processors,andothersupportingprocessorsthroughoutthesystem.

简介：摘要：通过基于研华DAQ板卡的开发平台，完成了多路模拟切换器、解码电路和阻抗检测电路的设计，为汽车线束检测系统搭建了一个良好的硬件平台，通过检测软件送入不同的值给硬件的数据采集卡的数字I/O来选择被测点，然后再从每一个回路中读取电压信号，把电压信号送入计算机，由检测软件进行分析、处理、显示，使硬件系统其能够成为LabVIEW软件应用开发的平台。

简介：目前超宽带中的高压开关技术正向着高气压、高重复频率、低抖动、快前沿方向发展。铁电体作为触发极具有触发电压低、抖动小的特点。用铁电体作为触发极开关在国际上已经受到人们越来越多的重视。为掌握铁电体作为触发极的工作性能，在充气和真空条件下开展了实验研究。

简介：本文结合教学实践,全面仔细论述了触发器的逻辑功能及其表示方法,电路结构及触发方式.

简介：作为确立其激进的自由理论的内在要素,情感,或者更准确地说,感受性问题在萨特的整个思想事业中占据着独特的、不可或缺的地位：它们需要被证明为是内在于我们的生存谋划的,或者说正是我们自我选择的基础谋划为感受世界的方式提供了依据;惟此,我们才能宣布对于自己的所有的存在形态的终极责任。但另一方面,正是对于作为感受性的存在论根基的基础谋划的深入考察,最终迫使萨特对其早期的自由理论做出了重要的限定和调整。

简介：这句话中预设了每个人都知道罗马这样一个地方,预设是说话人的预设,中我们得知A预设了

简介：当今中国是一个资源匮乏的国家，节约资源，保护环境显得尤为重要，建设资源节约型社会．促进社会进步和环境保护是我们共同的责任。我发明的触发式可控插座对于减少家庭支出，节约电力资源有着极大的作用。

简介：摘要什么是触发？触发功夫内涵，触发功夫修炼